T4 Mustang Axle Ratio and Wheels
#30149 from Scotty White · Rule change · TB 21-02 (2021-02 Fastrack)
In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly allowed. 3.45 or 3.55 final drive ratio allowed with +25lb penalty."